Why would this cop order the man to sit on the crate then arrest him?

506.509 Possession of shopping carts, laundry carts, dairy cases, egg baskets, poultry boxes, or bakery containers.—Any person who is in possession of any shopping cart, laundry cart, dairy case, egg basket, poultry box, or bakery container with a registered name or mark shall be presumed to be in possession of stolen property and is guilty of a misdemeanor of the first degree, punishable as provided in s. 775.082.


https://www.youtube.com/watch?v=MYZGqa_ifSk